Isuzu — Air bleeding procedure:

A Isuzu service procedure — check it applies to your exact model before use.

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Procedure

1. 2. During removal, be careful not to stain the parts
2. 3. After changing the fuel filter element, conduct fuel air
3. 2. Change the element, if element damage is found
4. 3. Take care not to cause air leakage (sucking) when _
5. 6. ENGINE CARE IN COLD SEASON
6. 2. COOLANT
7. 3. ENGINE OIL
8. 7. ENGINE ELECTRICAL WIRING DIAGRAMS |
9. 8. ENGINE MAINTENANCE SCHEDULE
10. 3. Oil pressure gauge No No
11. 1. The service intervals after 1000 operation hours should also be made every 250 operation hours in accordance with this check
12. 2. When the servicing on the asterisked (+) items are necessary, consult the equipment supplier.
13. 1. Oil level and oil fouli
14. 10. Injection nozzle check
15. 11.
16. 12.
17. 13.
18. 14.
19. 15.
20. 16.

Source: manual:ISUZU Instruction Manual 3LA1 3LB1 3LD1 2000.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.